Method and apparatus for producing fibrous articles



1927 H. G. WALKER ET AL METHOD AND APPARATUS FOR PRODUCING FIBROUS ARTI CLES' Filed Feb. 27, 1923 3 Sheets-Sheet l 11. 25 1927. H. e. WALKER El AL METHOD AND APPARATUS FOR PRODUCING FIBROUS ARTICLES Filed Feb. 27, 1923 3 Sheets-Sheet 2 fllberTT March 1 615,424 1927" H. G. WALKER ET AL METHOD AND APPARATUS FOR PRODUCING FIBROUS ARTICLES Filed Feb. '27, 1923 "s Sheets-Sheet :5

Patented Jan; 25,1927. 1,615,424

UN? STE. I

HOWARD GEORG E WALKER, OF BERWYN, AND ALBERT THOMAS MARCH, OF CHICAGO, ILLINOIS, ASSIGNORS TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y 'fA CORPORATION OF NEW YORK.

METHOD AND APPARATUS FOR PRODUCING FIIBROU$ ARTICLES.

Application filed February 27, 1923. Serial No. 621,530.

his invention reiates tti a method of Fig. 2 is a top plan View of the apparatus and apparatus for producing fibrous articles, shown in Fig. 1, parts being omitted thereand more particularly to a method of and from for the sake of clearness; apgaratus for coating cores. Fig. 3 is a fragmentary side elevation, in

:. ne object of the-invention is to produce section, of such apparatus showing the a core havinga coating of pulp thereon method in which the pulpous material is which is attached to the core solely by an deposited upon the rotatable foraminous intermingling of the fibers thereof and member and on the core;

without the use -of any adhesive substance. Fig. 4 is a fragmentary longitudinal view,

in Another object of the invention is to proin section, of the rotatable member and its duce a fibrous sheet consisting solely of f' opmted rnountlng; intermingled pulp fibers. Figs. 5 and 6 are enlarged views showmg Briefly, the m thod con i t in d o iti g the form of the pulp coating on the core as it pulpous material upon a iiiora-minous memdelivered from the carrier and the squeez- 5 her, removing moisture from-the deposited mg rolls respectively;

material, and applying pressure to; the de- Figs. 7 and 8 are enlarged views showing posited material to release it from the foe f rm of the pulp mating on the core raminous member. Then a core being during the forming operation and after the coated the pulpous material is deposited forming operation is completed respectively, an upon the core as well as upon the feraminous d member and the material afteri b'eing re- Fig. 9 is a fragmentary side elevation leased from the foraminous memb r i showing a modification of the rotatable formed around the core to constitute a fii us I 'lomherhomogeneous coating therefor. I The steps of the method Will be readily The pr nt, th d y b l d t understood from a detailed description of advantage for ins lating electri l i ei the apparatus by which the method can be tors, but it is to be understood that it is p a ticed. Referring to the drawings in denot, limit d to this urp b t l in so tall ll'nTVlllCll like reference numerals desigfar as i d fi d b th d d l im nate slmliar parts throughout the several :zo Where the method is used for insulating views, a re to be c at d is fed from a r c l onductors, manila, wood, m supply roll 10 over an idler roll 11, and then cotton, esparto, jute, hemp and asbestos nd a drum 12 which s partially subpulps may b l d as th ti merged in a fluid containing pulp wlthin terial, but other materials than those speciav semi-circular trough 13. The drum 12 3'7, fied may be used without departing from the m y be of a y Suitable ype, pref ra y spirit and scope of the present invention 11 g one end open while the other end is which contemplates in its broadest aspect 910S6d y =1 Sheet m l sldo 1 The r m the coating of any (3011} with any l is rotated around a fixed tubular axle 18 by The drawings illustrate an apparatus by means f a p ey 19 attached by means of which the method may be practiced, the apa set screw. 2 0 o eljw se to a hearing paratus being especially designed for coatmember 21 Which by a P ah y iug a core in strand form or for making a of arms a p r p al p l n 23- Atfihrons sheet, but it is to be understood that tached 0 the POI'tiOII 23 t PP t Sides of other ap uiratns may be devised for coating the drum are formed members 24 and 25. 45 cores in other forms without departing from which eXtOnd toward th C er Of the drum the spirit and scope of the invention. and leave an opening 16 therebetween, The word pulp as used in the spociticawhich opening is covered by a strip of fine tion and claims is to be understood as de- Wire mesh or other suitable foraminous matining and including any cohering fibrous erial 17- Attached to a right-hand pemass Whether suspended in a liquid, moist, ripheral portion 54 similar to a portion 23 or substantially dry. and therethrough to the member 25 are a 1n the accompanying drawings: plurality of radial arms 26 similar in char- Fig. lis a side elevation of a preferred acter to arms 22 andwhich terminate in-a apparatus for performing the process; bearing ring 27 rotating upon the tubular axle 18 for supporting the associated end of the drum 12.

The left-hand end of the tank is closed, Where the tubular axle enters, by means of a stuffing box of any usual structure which may comprise, a gland member 28 of any suitable packing material, held in place by a threaded nut 29, engaging the threaded extension 30 of the tank. The right hand end of the drum is open as indicated, and an opening correspondiiw with a portion of such opening, is provided in the right hand side of the tank. Attached to the edge of the right hand end of the tank which is in contact with the moving peripheral portion 23 of the drum is a partial water seal 32 of canvas or a similar material, which is bent at right angles and caused to rotatably engage the periphery of the portion 54. A hoop member 34 of any suitable material and clamped together in any desirable manner at the top of the apparatus, as by a suitable bolt and nut clamp 35, serve to maintain the canvas 32 in engagement with the portion 54 as the drum rotates and thus substantially prevents the escape of liquid from the tank into a receptacle 38 attached at. the right hand end of the drum. A collar 39 attached to the tubular axle 18 positions the caring member 27 on the axle. The axle 18 is supported in a suitable manner, such as by the supports 40 and 41, from a frame work 42, which also serves to support all of the other parts of the apparatus.

Extending through the hollow shaft 18 are conduits 44 and 45 which are bent at right angles, extend through suitable bushing members in the axle, and terminate in open chambers or compartments 47 and 48 respectively. The peripheral portion 23 of the drum in rotating remains in contact with the edges of the walls of these chambers or compartments, and asthe drum rotates, the openings in the bottoms of compartments formed in the drum by the radially disposed walls 49, cooperating with the members 24 and 25, are placed suressively inengagement with the open ends of the compartments 47 and 48 through the openings 50 in the drum compartments. The compartments 47 and48 are suitably supported from the stationary axle 18 by means of a frame work 51.

Extending from the right into the receptacle 38 attached to the right hand side of the tank 13 is'a conduit 512 which terminates in an adjustable inlet. pipe 53. The pipe 53 may be rotated around the conduit 52 so as to maintain the height of the fluid within the drum 12 and the receptacle 38 at the level indicated by a dotted line A. The fluid containing pulp outside of the drum 12 and within the tank 13 is maintained at a level indicated by a dotted line B. These levels are maintained due to the action of the conduit 52 and its adjustable inlet53, as well as by supplying additional pulp fluid through a pipe 54, connected with any suitable supply tank (not shown), and by an adjustable discharge pipe 55. A continuous circulation of the pulp mixture is maintained by feeding the pulp mixture from the pipe 54 into the left-hand end of the tank 13 and out of the tank through the pipe 55 into a receiving tank (not shown), from which it is pumpd into a tank (not shown) associated with the supply pipe 54. As the drum 12 revolves in the tank, due

to the difference in levels of the fluid in the tank and in the drum and associated receptacle 38, the fluid will pass through the line wire mesh 17 in the drum, straining the pulpous material onto the surface ofsuch mesh. It will be noted that by adjusting the height of pipe 55 as Well as adjusting the position of pipe 53, the difference in levels A and B or the eflective head of the supply may be varied as desired.

Attention is called to the fact that the idler roll 11 is so placed from the periphery of the drum 12 that the core is held out of contact with that section of the foraminous portion of the drum which is near the surface of the fluid in the tank, whereby pulp is strained onto said section of the foraminous strip 17 before the strand is brought into contact therewith. The first deposit of pulp on the foraminous portion is indicated by the letter C (Fig. 3). As the drum revolves in the tank, an additional amount of pulpous material will be deposited upon the core and also upon the foraminous portion of the drum, forming a thicker coating, indicated by the letter D (Fig. 3). The drum 12 is rotated in the direction indicated by the arrow by means of a belt driven from a source of power and cooperating with the pulley 19, and the pulp on the foraminous member 17 after it emerges from the level of the fluid is subjected to suction'applied from any suitable source through the conduit 4410 the chamber 47. Thus as the core and the deposited material reach a point in line with the chamber 47, moisture is extracted from said pulp by means of the suction arrangement. Al though the suction pipe is shown as being applied to only one or possibly two of the drum compartments. it is l'tb be. understood that the chamber 47 may he made of such dimensions as to include a greater number of the drum compartments. After a considerable portion of the moisture has been removed from the pulp, a point in line with the chamber -18 which is subjected to pressure, such as compressed air, supplied from a suitable source through the conduit 45 and blowing against the under side of the ulp as it is secured to' the foraminous strip 17 on the drum 12.

the drum reaches- Hit) lltl

This pressure tends to release the pulpous material from the foraminous member and as the core and the associated pulp leave the drum, they assume a shape substantially as shown in Fig. 5. Thereafter the core and the deposited pulp pass through a pair of squeezing rolls 56 and 57. the latter of which is driven by a belt 58 connected to any suitable source of power. The rolls 56 and 57 are carried by a suitable bracket secured to a framework (it) supported upon a common framework 42. The rolls 56 and 57 are forced togethcrby any suitable tension means which is adjustable to exert the proper pressure upon the core and the pulp as they pass between the rolls, this process serving to mat the. pulpous material and \secure it to the core to such an extentthat the core and the pulp as they leave the rolls assume the form shown in Fig. 6, From the squeeze rolls the core with its ribbon pulp coating is drawn through a former, designated generally by the character 61. which Wraps the projecting edges of the ribbon around the core and around each other, the appearance of the coating after it is first acted on by the former and after the forming action is completed being shown in Figs. 7 and 8 respectively. The former causes a thorough intermingling of the pulp fibres and shapes the coating so that it embraces the core and conforms to the shape thereof. This step of the PI'OLQSS forms the coating into a mass so homogeneous that upon cutting the core and coating, the latter Will not fray or ravcl and will not become easily detached from the core.

The former 61 is illustrated as being of the same type as that fully shown and described in a co-pending application of \Vallrcr and March. Serial No. 5%,9'23, filed March 25), 1922. Reference is made to such application for a full disclosure thereof.

The former consists essentially of two plates 62 and 63 which wrap the projecting edges of the pulp ribbon around each other and around the core in much the same manner as though the core and the pulp ribbon were rolled on a table top with the palm of the hand.

The core with its formed coating is then drawn from the former and subjected to a mechanism for thoroughly drying out the coating. The means shownfor performing this step in the process are a pair of wide hollow drums (i4 and (35, heated internally and having a plurality of grooves (36 formed thereon (Fig. 2), which receive the core, guides (not shown) being provided for directing the core over first one of the drums and then over the other drum until it has traversed all of the grooves on both drums, after which it is stored on a receiving drum 67. Drums 64, 65, and 67 are revolably a sizing substance, or

posited on a core which mounted in suitable bearings carried by vertical standards supported by theframework 4-2. The drum 64: is driven by a belt (58 connecting with any suitable source of power and in turn drives the drum 67 through the iucdirm of a belt 69.

In case the machine disclosed is to be employed for making a fibrous sheet as in the manufacture of paper, the supply roll 10, the idler roll 11. and the core carried thereby and the apparatus shown for squeezing the pulp on the core and forming the coating of pulp around the core, the coated core after it has been passed through the former 61 may be omitted The foraminous strip 17 of the drum 1?. determines the width of the sheet to be manufactured and may be made of any suitable width. In this use, after a considerable portion of the moisture has been removed "from the sheet by the suction means applied through the chamber 47, the pressure applied through the chamber 48 tends to release the mlp from the foraminous member 17 so that it may be lifted therefrom and passed over the usual drying and calendar rolls employed in the manufacture of sheets or strips ot paper in the ordinary manner.

in Fig. 9 a modifitation of the drum 12 and associated apparatus is shown wherein the suction etlcct utilized for straining the tluid through the foraminous member 17 may be suplemcnted by additional positive suction means operating through a conduit '70 leading through the hollow shaft 18 and extending at right angles thereto into a chamber 71 which is located beneath the level of the fluid outside of the drum. In this manner it is possible to cause the deposit of pulp in greater quantities upon the foraminous member 17 and in some cases it may be desirable to have the chamber 71 extended to cover a plurality of the drum chambers instead of being applied to only one chamber as shown in the drawing.

Although it has been stated that one of the objects of the invention is to apply a coating of pulp to a Core without the use of any adhesive substance, the process herein disclosed may be used with a pulp mixture containing the pulp may be dehas been previously treated with an adhesive agent, without departing from the spirit and scope of the present invention.

\Vhat is claimed is:

1. A method of coating a core in strand form with pulp, which consists in depositing wet pulpous material on a foraminous member. positioning the core adjacent said deposited material, .depositing additional wet, pulpous material on the core 'and on said foraminous member, removing the core and all of the pulpous material from the foraminous member and. then forming the as well as for drying lil-O ing a ribbon of material on the core to constitute a coating conforming with the shape of the core.

2. A method of coating a core in strand form with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional wet, pulpous material on said foraminous mem ber, removing the core and all of the pulpous material from the foraminous member and then forming the material on the core to constitute a coating conforming with the shape of the core.

3. A method of coating a core in strand form with pulp, which consists in depositing wet, pu pous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional wet pulpous material on the core, removing the core and all of the pulpous material from the fOl'dll'lillOllS member and then forming the material on the core to constitute a coating conforming with the shape of the core.

4. A method of coating a core in strand form with pulp, which consists in depositwet, pulpous material on a foraminous member, positioning the core adjacent said deposited ribbon, depositing additional wet pulpous material on the ribbon, removing the core and all of the deposited material from the foraminous member and then forming the material on the core to constitute a coating conforming with the shape of the core.

5. A method of coating a core in strand form with pulp, which consists in depositing a ribbon of wet, pulpous material on a foraminous member, positioning the core adjacent said deposited ribbon, depositing additional wet, pulpous material on the core, removing the core and all of the deposited material from the foraminous member and then forming the material on the core to constitute a coating conformingwith the shape of the core.

6. A method of coating a core in strand form with pulp, which consists in depositing a ribbon of wet, pulpous material on a foraminous member, positioning the core adjacent said ribbon, depositing additional wet, pulpous material on the core and on the ribbon, removing the core and all of the deposited material from the foraminous member and then forn'iing the material on the core to constitute a coating conforming with the shape of the core.

7. A method of coating a core in strand form with pulp, which consists in straining fluid containing pulpous material through a foraminous member to thereby deposit pulpous material thereon, causing relative movement between the core and the foraminous member to adjacently position the core and the de osited material, depositing additional pu pous material on the foraminous member, causingrelative movement between the foraminous member and the core whereby all of the said deposited material is retained on the core and then forming the material on the core to constitute a coating conforming with the shape of the core.

8. A method of coating a core in strand form with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional wet pulpous material on the core and on said foraminous member, removing the greater part of the moisture from said pul ous material, removing the core and all of said pulpous material from the foraminous member, and then forming the pulpous material around the core to constitute a homo geneous coating therefor conforming with the shape of the core.

9. A method of coating a core in strand form with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional wet pulpous material on the core and on said foraminous member, removing the greater part of the moisture from said pulpous material, removing the core and all of said pulpous material from the foraminous member, forming the pulpous material around the core to constitute a homogeneous coating therefor conforming with the shape of the core, and then removing substantially all of the moisture from said coating.

10. A method of coating a core in strand form with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional wet, pulpous material on the foraminous mem r, removing some of the moisture from the deposited material, removing the core and all of the pulpous material from the foraminous member and then forming the material on the core to constitutea coating conforming with the shape of the core.

11. A method of coating 21 core in strand form with pulp, which consists in de siting wet, pulpous material on a forammous member, positioning the core adjacent said deposited material, depositing additional wet, pulpous material on the core and on said foraminous member, removing some of the moisture from the pulpous material, re moving the core and all of the pulpous material from the foraminous member and then forming the material on the core to constitute a coating conforming with the shape of the core.

12. A method of coating a core in strand form with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional wet,

. terial on pulpous material on the core, removingsome of the moisture from the deposited material, removing the core and all of the ulpous material from the foraminous mem r and 6 then forming the material on the core to constitute a coating conforming with the shape of the core.

13. A method of coating a core in .strand form with pulp, which consists in depositing 10' a ribbon of wet, pulpous material on a foraminous member, causing relative movement between the core and the' member to adjacently position the core and the ribbon, depositing additional wet, pulpous material on the ribbon, removing the core and allof the deposited material fromthe foraminous member, and then wrapping the ribbon and the additional deposited material around the core to constitute a homogeneous coating therefor.

14. A method of coating a core in strand form with ulp, which consists in'depositing a ribbon oi wet, pulpous material on a foraminous member, positioning the core adjacent and parallel with said deposited ribbon, depositing additional ribbon of wet, pulpous material on the core and foraminous member, removing the core and the ribbon of pulpous I material from the foraminous member, and then wrapping the -ribbon around the core to constitute a homogeneous coating therefor. 15. A method of coating a core with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent the deiposited material,

removing the core from the oraminous member, directing a current of. air against the deposited material to release it from the foraminous member contemporaneously with 40 the removal of the core therefrom.

16. A method of coating a core with pulp,-

which consists in depositmg wet, pulpous" material on a foraminous member, positioning the core adjacent the deposited material,

' removing the core from the foraminous member, applying pressure to the deposited material to release itfrom the foraminous member contemporaneously with the removal of the core therefrom.

" 17. A method .of coating a core withpulp,

-which consists in depositing wet, pulpous material on a foramlnous member, positionin the core adjacent the deposited mateb 0 v rial, removing the core from the foraminous '6' member, directing a current of air through the foraminous member against the deposited material to release it from the forami-t nous member contemporaneouslv with the removal of the core therefrom. 18. A method coating a core with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional wet. pulpous mathe core and on said foraminous member, permitting member, removing the'greater part of the morsti re from said pulpousmaterial whereby 1t is attached to the core, subjecting the under side of the foraminous member to pressure suflicient to dislodge therefrom the pulpous material deposited thereon, and then removing said core and pulpous material from the foraminous member.

19. A method of coating a core with ulp, which consists in depositing wet, pu pous 76 material on a foraminous member,-positionmg the core adjacent said deposited material, depositing additional Wet, pulpous material on the core and on said foraminous mem-- ber, removing the greater part of themois- 80 ture from said pulpous material whereby it is attached to the core, subjecting the under side of the foraminous member topressure suflicientto dislodge therefrom the pulpous material de osited thereon, removing said core and pu pous material from the foraminous member, and then forming said material on the core to constitute a homogeneous coating therefor.

20. A method of coating a core with pulp, which consists in depositing wet, pulp-' ous material on a foraminous member, po-' sitioning the core adjacent said deposited material, depositing additional wet, pulpous material on the core and on said foraminous member, removing the greater part of the moisture from said pulpous material whereby it isattached to the core, subjecting the under side of the foraminous member to air, pressure sufiicient to dislodge therefrom the pulpous'material deposited thereon, and then removing said core and pulpous material a from the foraminous member. i

21. A method of coating a core with pulp, which consists in depositing wet, pulpous material on a foraminous member, positioning the core adjacent the deposited material, depositing additional wet pulpous material on the core'and on said foraminous member, permitting the free liquid .in the pulpous material on the core and on the foraminous member to drain through the said member,- subjecting the pulpous material on the core and on the foraminous member to suction to remove the'greater .part of the moisture from said pulpous material whereby it is attached to the core, then subjecting the pulpous material on the core and on the foraminous member to air pres'ure to remove the pulpous material from the foraminous member, and then removing. the core carrying the pulpous material from the foraminous member.

22. A method of coating a core with pulp, which consists in depositing wet, pulpous material on a foraminous member positioning the core adjacent the deposited material, depositing additional wet, pulpous material on the core and on said foraminous the free liquid in the pulpous materialon the core and on the foraminous member to drain through the said member,subjecting the pulpous material on the core and on the forannnous member to suction to remove the greater part of the moisture from said pulpous material'whereby it is attached. to the core, subjecting the pulpouslmaterial on the core and on the foraminous member to air pressure to re-' move the pulpous material from the foraminous member, then removing the core carry ing therpulpous material from the foraminous member, and then forming said material on the core to constitute a homogeneous coating therefor.

23. .A methodof coating a core in strand form with pulp, which Lcpnsists in depositing pulpous material on a foraminous member, positioning the core adjacent said deposited material, depositing additional pulpous material on the core and on said foraminous member, so treating the pulpous material on the foraminous member that it is attached tothe core, subjecting the pulpous material on the foraminous member to pressure suflicient to remove. the pulpous material therefrom, removmg the core from the forammous member carrying the pulpous material therewith and then forming the material on the core to constitute a coating conforming with the shape of the core.

24. A method of coating a core in strand form with pulp, which consists in depositing pulpous material on a foraminous member, positioning the core adjacent said depositing material, depositing additional pulpous material on the core and on said foraminous member, so treating the pulpous material on the foraminous member that it is attached to the core, then subjecting the pulpous material on the foraminous member to pressure suflicient to remove the pulpous material therefrom, removing the core from the foraminous member carrying the pulpous material therewith, forming said material on the core to constitute a homogeneous coating therefor conforming with the shape of the core.

25. A method of coating a core in strand form with pulp, which consists in depositing a ribbon of wet, pulpous material on a foraminous member,- placing the core adjacent said deposited material, depositing additional wet, pulpous material on the core and on said deposited ribbon, removing the greater part of the moisture from said pulpous material on the core and on the foraminous member whereby it is attached to the core, subjecting the pulpous material on the foraminous member to a pressure suflicient to remove the material from said member, removing the core carrying the pulpous ribbon therewith from the foraminous member and then forming the material on the core to 26. A method of coating a core with pulp,- depositing a ribbon of wet,

whichconsists in pulpous material on a foraminous member,

placing the core adjacent said deposited material, depositing additional wet, pulpous material on the core and on said deposited ribbon, removing the greater part of the moisture from said pulpous material core and on the foraminous member whereby it is attached to the core, subjecting the pulpous material on the foraminous member to a pressure sufficient-to remove the malerial from said member, removing the core carrying the pulpous ribbon therewith from the foraminous member, and then wrapping said ribbon around the core to constitute a homogeneous coating therefor.

27.'In a machine for coating a core in strand form, a tank of fluid containing pulp, a rotatable member mounted in said tank, said member having a foraminous portion, means for straining onto said i'o-raminous portion, means for drawing said strand around said rotatable member into contact with the deposited material on said foraminous portion, means for removing said pulp and core from said foraminous portion and then forming the material on the core to constitute a coating conforming with the shape of the core.

28. In a machine for coating a core in strand form, a tank of fluid containing pul a rotatable member mounted in said tanii, said member having a foraminous portion,

means for straining pulp from said fluid.

onto said foraminous portion, means for drawing said strand around said rotatable member into contact with the deposited material on said foraminous portion, and means for removing'said pulp and said core from said foraminous portion, said means including means for directing a current of air against the pulp on said foraminous portionto assist in the release 0 member.

29. In a machine for coating acorein strand form, a tank of fluid containin pulp, a rotatable member mounted in saif tank, said member having a foraminous portion, means for straining pulp from said fluid onto said foraminous portion, means for drawing said strand around said rotatable member into contact with the deposited material on said foraminous portion, means cooperating with the foraminous portion for removing some of the moisture from the pulp thereon, means for removing the pulp and the core from the foraminous ortion and then forming the material on t e core to constitute a coating conforming with the shape of the core.

30. In a machine for the pulp from the coating a core in on the strand form, a tank of fluid containing pulp, a rotatable member mounted in said tank,

said member having a foraminous portion,

means for straining pulp from said fluid onto said foraminous portion, means for drawing said strand around said *rotatable member into contact withthe deposited material" on said foram'inousportion, means 00- operating with the foraminous portion for removing a portion "of the moisture from said deposited pulp, and means also co-opcrating with said foramiiious portion for removing the said pulp andsaid core from said foraminous portion and then forming the material on the core to constitute acoating conforming with the shape of the core. I 31, .In a machine for coating a core .in strand form, a tank containing a mixture of liquid and pulp a rotatable member mounted in said ta said member having a foraminous portion, means for straining pulp from said liquid onto said foraminous portion, means for around the rotatable member and into contact withthe deposited material on the foraminous member, removing the greater part of the moisture from said pulpous material, on the core and foraminous portion, and means for removing the pulpous material from the foraminous portion, said means comprising a source of pressure connected with said foraminous portion. 5

32. In a machine for coating a core in strand form, a tank containing a mixture of liquid and pulp, a rotatable member mounted in said tank, said member having a foraminous portion, vmeans for straining pulp from said liquid onto said foraminous portion, means for drawing said strand aroundsaid rotatable member and into contact with the deposited'material on said foraminous portion; suction means connected with said foraminou's' portion .for removing the greater partpof the moisture from the pulpous material on the foraminous portion and on said core, and pressure means connected with said foraminous portion for removing the pulpous material deposited thereon. v

33. A method of coating a core in strand form with pulp, which consists in depositing wet pulpous material on a foraminous member, removing moisture from the deposited pulpous material to form a sheet, passing a current of air through the foraminous member to release the pulpous material from the member, removing the pulpous material from the member, and then forming the said pulpous material on the core to constitute a coating on the core to conform with the shape thereof.

34. A method of coating a core in strand form with pulp, which consists in positiondrawing 5 said strand material from theforaminous member, and

then forming the pulpous material on the the pulpcore to constltute a coating thereon conform- -1 ing with the shape of the core.

35; A method of coating a core in strand form with pulp, which consists in position-v ing the core ad acent a foraminous member,

causing relative movement between a supply of fluid containing pulp and the foraminous member to deposit wet pulpous material on the member, passing a currentof air through the member to assist in removing the deposited material from the member, and then forming the pulpous material on the core to constitute a coating thereon conforming with the shape of the core.

36. In a machine for coating a core in strand form with pulp, a receptacle for holding a supply of fluid containing pul ous material, a member rotating therein and aving a plurality of compartments in its periphery, a foraminous covering for each compartment, means for ositioning the core to be coated adjacent sai foraminous covering, means for producing suction in the compartments within the .fiuid to deposit pulp upon the foraminous coverings, means for producing suction in the compartments after they emerge from the fluid to remove moi.

ture from the deposited pulp for forming a fibrous sheet, means for producing pressure in a compartment for assisting in removing the deposited pulp from the member,

means forremoving the core and pulpous material fromthe member, and means for forming the pulpous material on the core to constitute acoating on'the core conformingj i with the shape of the core.

37. In a mach'ne' for coating .a eorejin I llU strand form with pulp, a member having a plurality of individual compartments-in its periphery.v covered by foraminous material,-

a receptacle for holding a supply of fluid" containingpulpous material, means for ro Y tating the member through the fluid, means co-operating with the compartments in contact with the fluid to deposit pulpous ma.- terial from the fluid upon the asmciated foraminous material, means for positioning the core to be coated adjacent the foraminous material, means co-operating with the compartments without the fluid to maintain the deposited pulp in contact with the member,

means co-operating withvan additional compartment, also out of contact with the fluid,

to release the deposited material from engagement with the member, means for re-' moving the core and pulpous material from the member and means for forming the pulpous material on the core to constitute causing contact a coating thereon conforming with the shape of the core.

38. A machine for coating a core in strand form with pulp, a member having a plurality of individual compartments in its periphery covered by foraminous material, a receptacle for holding a supply of fluid containing pulpous material, means for moving the member so that the compartments pass through the fluid in sequential order, means for positioning the core to be coated adjacent the foraminous material, means co-operating with the compartments in engagement withthe fluid to deposit pulpous material upon the foraminous coverings of such compartments, means co-operating with the compartments which have passed through and become disengaged from the fluid to prevent fluid therein from flowing against and releasing thematerial from the foraminous member and to remove moisture from the pulpous material to form a sheet, means for removingthe core and Julpous material from the foraminous mem )er and means for forming the pulpous material on the core to constitute a coating thereon conforming with the shape of the core.

39. A method of coating a core. in strand form with pulp, which consists in depositing pulpous material on a foraminous member, causing contact between said core and the pulpous material on the foraminous member, removing the core and the pulpous material from said foraminous member, and then forming said material on the core to constitute a homogeneous coating thereon having a substantially circular outer surface.

, 40. A method of coating a core in st and form with pulp, which consists in depositing pulpous material on a foraminous member, between said core and the pulpous material on the foraminous member, simultaneously removing the core and pulpous material from said foraminous member,

and then forming said material on the core to constitute a homogeneous coating thereon having a curved outer surface.

41. A method of coating a core in strand form with pulp, which consists in depositmg a ribbon of pulpous material on a foraminous member, causing contact between said core and the pulpous ribbon on the foraminous member, removing the core and pulpous ribbon from said foraminous member and then forming the material on the core to constitute a coating conforming with the shape of the core.

42. A method of coating a core in strand form with pulp, which consists in depositing a continuous ribbon of pulpous material on a foraminous member causing contact between said core and the continuous pulpous ribbon on the foraminous member, re-

moving the core and continuous pulpous ribbon from said forammous member and then forming the material on the core to constitute a coating conforming with the shape of the core. v

43. i A method of coating a core in strand form with pulp, which consists in depositing wet pulpous material on a foraminous member, positioning the core adjacent said doposited material, depositing additional wet pulpous material on the core and on said foraminous member, removing the core and all of the pulpous material from the foraminous member and simultaneously removing some of the moisture from said material and then forming the "material on the core to constitute a coating thereon conforming with the shape of the core.

44. A method of coating-a core in strand form with pulp, which consists in depositing wet pulpous material on a foraminousmember, positioning the core adjacent said de-' posited material, depositing additional wet pulpous material on the core and on said foraminous member, removing thecore and all of the pulpous material from the-foraminous member and simultaneously removing part of the moisture from said material, forming-the material on the core to constitute a coating thereon conforming with the shape of the core, and then removing substantially all of the moisture from said material.

45. A method of coating a core in strand form with pulp, which consists in depositing wet pulpous material on a foraminous member, positioning the core adjacent said deposited m'aterial, depositing additional wet pulpous material on the core and on the foraminous member, removing the core and all of said pulpous material from the foraminous member and simultaneously removing some of the moisture therefrom, removing additionalmoisture from said pulpous material forming said material around said core to constitute a homogeneous coating therefor conforming with the shape of the core, and then rem-loving substantially all of the moisture from said coating.

46. A method of coating acore in strand form with pulp, which consists in depositing a ribbon of wet pulpous material on a foraminous member, placing the core adjacent said deposited material, depositing additional Wet pulpous material on the core and on said deposited ribbon, removing the core and said ribbon from the foraminous member and simultaneously removing some of the moisture from said ribbon and then forming the material on the core to constitute a coating thereon conforming with the shape of the core.

47. A method of coating a core with pulp, which consists of depositing a ribbon of Wet pulpous material on a foraminous member, placing the core adjacent said deposited material, depositing additional wet pulpous material on the core and on said ribbon, removing the core and said ribbon from the foraminous member and simultaneously removing some of the moisture from said ribbon, and then wrapping said ribbon around the core to constitute a homogenous coating therefor.

48. A method of coating a core with pulp, which consists in depositing a ribbon of wet pulpous material on a foraminous member, placing the core adjacent to said deposited material, depositing additional wet pulpous material on the core and on said ribbon, removing the core and said ribbon from the foraminous member and simultaneously removing some of the moisture from said ribbon, wrapping said ribbon around the core to constitute a homogeneous coating therefor, and then removing substantially all of the moisture from said coating.

In witness whereof, we hereunto subscribe our names this 16th day of Feb. A. D., 1923.

HOWARD GEORGE WALKER. ALBERT THOMAS MARCH. 

